<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 表单 -->
            <el-form label-width="0" class="login_form" :model="loginForm" :rules="loginRules" ref="loginFormRef">
                <el-form-item prop="username">
                    <el-input prefix-icon="el-icon-user-solid" placeholder="请输入用户名" v-model="loginForm.username">
                    </el-input>
                </el-form-item>

                <el-form-item prop="password">
                    <el-input prefix-icon="el-icon-lock" placeholder="请输入密码" v-model="loginForm.password" show-password>
                    </el-input>
                </el-form-item>

                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登陆</el-button>
                    <el-button type="info" @click="reset">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
import http from '@/util/http'
export default {
  data () {
    return {
      // 登陆表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则对象
      loginRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置的点击函数
    reset () {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },

    login () {
      // 在发起请求前对表单整体做一个验证
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        this.$message.success('登陆成功')
        // 将登陆成功后的token值存放在sessionstorage(会话级别)
        window.sessionStorage.setItem('token', res.data.token)
        // 通过编程式导航跳转到home页面
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
    background: #2b4b6b;
    height: 100%;
    width: 100%;
}

.login_box{
    width: 450px;
    height: 300px;
    background: #fff;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);

    .avatar_box{
        width: 130px;
        height: 130px;
        border-radius: 50%;
        padding: 10px;
        border: 1px solid #eee;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background: #fff;

        img{
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background: #eee;
        }
    }

    .btns{
        display: flex;
        justify-content: flex-end;
    }

    .login_form{
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 20px;
        box-sizing: border-box;
    }
}
</style>
